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10 Scientific Breakthroughs We Couldn't Live Without

10 The Wheel.. HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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10 The Wheel.. HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live...

9. Blade...HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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9. Blade...HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live...

8. Clothing..HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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8. Clothing..HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live...

7. Shelter...HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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7. Shelter...HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live...

6. Sewage Disposal...HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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6. Sewage Disposal...HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't...

4.  Fire  HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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4. Fire HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live...

3. Agricultural Crops  HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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3. Agricultural Crops HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't...

2. Antibiotics  HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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2. Antibiotics HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live...

5. Water Purification  HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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5. Water Purification HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't...

1. Food Preservation  HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't Live Without" - 10 Scientific Breakthroughs We Couldn't Live Without

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1. Food Preservation HowStuffWorks "Top 10 Scientific Breakthroughs We Literally Couldn't...